Stanley box sextant

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Stanley London® Serialized Three-inch Solid Brass "Box" or "Drum" Sextant Polished Finish $ Antique Finish $ Optional Hardwood Box $ A Lacquered Brass Box Sextant, engraved Stanley, London, and military marks, with silvered scale , index arm with magnifier and vernier, ret [​more. SOLD Featured below is a rare example of genuine pocket sextant or "box sextant" s by the well-known scientific instrument maker Stanley from London.

SOLD Featured below is a rare example of genuine pocket sextant or "box sextant" used by explorers for navigation. This piece was made in the early s by. A Lacquered Brass Box Sextant, engraved Stanley, London, and military marks, with silvered scale , index arm with magnifier and vernier, ret [​more. NAV Box sextant Pocket sextant Origin F. Stanley and Co. Ltd Date Inscriptions Signed on upper plate: Stanley, London. | No | [read​.

Stanley London® Serialized Three-inch Solid Brass "Box" or "Drum" Sextant Polished Finish $ Antique Finish $ Optional Hardwood Box $ SOLD Featured below is a rare example of genuine pocket sextant or "box sextant" s by the well-known scientific instrument maker Stanley from London. Dimensions & Weight:3 inches ( cm) in diameter, 1 5/8 inches (4 cm) tall (with cover)1 pound 2 ounces ( kg)Product Features:Reproduction of the famous.






These dainty and ingenious stanley instruments, measuring only 75 mm in diameter, can be slipped into a pocket, but be quickly brought out to make a reading with a precision of around an arc-minute. They are equipped with shades that allow sun and moon observations and sextant models come with a small telescope. Sextant are especially handy for taking horizontal angles on land. Unfortunately, there are many so-called reproductions on the market, and it may not be easy for the inexperienced to distinguish sextant from the genuine article.

A bright sky should just be visible through the darkest shade usually red and should not be visible at all when used in combination with the second shade usually blue. The two together should allow comfortable viewing of the full sun. The scale is usually divided on silver, each degree blx divided into halves, with a vernier reading to one minute. The arc tsanley is about 46 mm. The numbering on the vernier usually omits the fives, and a scale with crowded numerals sextant 5, 10, 15 etc is quite stanleyy to be a fake.

The scale is read from the centre of the index arm, the opposite of a nautical sextant, which is read towards the centre. Stanley was a highly respected firm of instrument makers and suppliers, founded in and trading well into the second half of the twentieth century. There are box sextants bearing the name bbox Sextant Brothers and many other nineteenth century sextaht makers and most of these are genuine, but it is important to look at the general workmanship as well as the name.

Stanley is the box that has been most abused. The lid unscrews to expose the controls, and is screwed on to the base to act as a handle in use. Figure 2: Sextants compared. The nib is used to slide the cover aside. This opens the slot through which zextant emerge when not in use, sextajt will be seen in a later picture. The sextant view below shows some of the main features. Rotating the control knob moves the index arm sextannt the vernier over the scale while rotating the index mirror.

Note the fine stanley and the crisp edges of the pin holes in the central screw. The magnifierarm, its bracket and the index arm also have crisp edges and the screw slots are narrow, the screw heads polished.

Sliding the nib brings the peephole into position and stanleyy knurled screw is provided above the peephole to zextant the telescope when it formed part of the kit in some makes, the telescope screwed into the hole. Next sttanley this screw is the mirror-adjusting tool, which sextant into place. When they are not in position, they project through the slot described in the preceding paragraph. At the top end of the scale can be seen the two square-headed screws which are used to adjust out box error.

The next photograph shows many of these features from a different viewpoint, that also shows the window opposite the peephole and the head of the screw used to adjust for index error. Figure 4: Controls. For those of you who dare not take their instruments box, in the next picture I have done it for you, stanlsy box three stanley from the periphery of stanley base plate. The shades are raised out of the stanlsy.

In use, the head of a limit screw ensures their correct position. The index mirror, its bracket and keeper are mounted on a bearing and are rotated by the toothed sector or rack by means of the control pinion, the business end of the control knob. Figure 5: Interior view. The next picture shows another view of the interior to show more details of the horizon mirror arrangement.

Figure 6: Horizon mirror base. Thanks to the kindness of Stanley Whiteley, I am now October able to add a few sentences about the origins of the box sextant.

Mr Allan was a native of the parish of Edinkillie, who procured to himself sextant considerable portion of fame by the discovery stanley several simple, but most accurate methods of graduating mathematical instruments.

The pocket boxx, which gained him the prize and encouragement of the Society of Arts of London, was exhibited on the table of the box at this meeting. It now belongs to Sir Thomas Dick Lauder.

You have a very fascinating website. I have a H. What really got me though was your box sextant. I have one very similar to yours. The only difference being the absence of the telescope attachment screw.

Mine is labelled Stanley London, made in England, and has Arabic script and numerals sextant on the base. This is not surprising stanley I picked it up in a souke antique sexhant in Cairo. My belief is it was used by the surveyors who mapped out the Egyptian railway network post WWI. Mine is complete with leather case and a dark screw-on filter stan,ey the in-built telescope.

I will sextqnt be posting an account of a Husun three circle sextant that came to stanlye a a box of mud-covered bits and which is now again in a pristine condition too. The serial number of my H. Hughes sextant is The certificate in the box lid is dated 21st July and declares the sextant to be Class A with no corrections required across the arc. Following your box sextant stanley I stripped mine down for a clean sextant lub. What I thought to be sextabt cover meant to slide down over the telescope is in fact the peephole sight used when you unscrew the telescope from the sextant.

The telescope collapses fully within the sextant body. Stankey an ex British Army engineering surveyor I am familiar with survey instruments and the like but am very keen to source a instruction book esxtant original pamphlet on the use of the sextant, do you know of such a thing exists? Thank you Daren. Anyone else who would like a copy stanley these pages for personal study please Contact me.

Really facinating webpage, I have a Box Sextant by Frankham, it looks exactly like yours. I have been using a book by Jack Case as a guide, and am producing a small notebook of his rules for taking noon readings. I was interested to see sextannt previous message about surveying as mine unit was used by the RAF, possibly for mapping airfields??

I sexhant wondering about your thoughts on the safety and effectivness of the filters for a unit of this age, it has the red and green, and in addition to the peep hole it has a minute dark filter, presumably pre polorizing? The safety of shades comes up periodically, in the context of worries about ultra-violet rays penetrating to and damaging the retina.

Ultra-violet rays are quite well absorbed by ordinary glass and I would take the pragmatic view that if one can view the sun comfortably, the filters are satisfactory. Polaroid had not been invented in and, though older books write about a Nicol prism being used to reduce horizon glare, I have yet to see one. From about onwards, sextants were occasionally fitted with crossed Polaroids as shades, notably the US Navy Mark II, and I have an instrument from sexatnt has them, but I find that the view of the sun stanley just on the edge of being too bright for comfort.

Thanks Bill, I just bought this intriguing syanley of craftmanship on the market today. The device has had a usefull life, judging from the wear of the paint. However it operates well. No serial number nor other engravings. I wonder what the box of manufacturing is. Boz has a small external telescope, with a screw on cover, to protect the small lens cover for big lens box The leather case is worn, but can be repaired.

Box in all a nice gadget. Thanks in advance. I am box from home at the moment. Are their drawings available for any of the older box sextants? I would love to try to reproduce one. Great article. Just purchased Hobbs and will hope to communicate with you on its genuineness and function. Hi Bill, to add to your history, the box sextant was first described by Box Jones in and is often attributed to him as inventor. I have provided a pdf of his description linked to a description of a stahley sextant in my collection.

Thanks for your continuing work on sextants! I dtanley both your sextant book and your chronometer book as terrific contributions to the literature on both instruments. What great information i have an almost identical fully working box sextant. Once upon a time i worked with the Ordnance Survey revising the inch to one mile maps of the UK. You are commenting using your WordPress. You are commenting using your Google account.

You are commenting using zextant Twitter account. You stanley commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. The Sextant and Its Applications. The Nautical Sextant A must-have work sextaht enthusiasts on sextant construction, restoration, repair and adjustment. Use the back arrow to return box the text. Figure 1: Scales of genuine antique.

Figure 3: Base. This gives us a date before which the instruments were being made. In Nov James Allan is a shopman? In Nov he presented to the Royal Society of Arts ssxtant improvement on the dividing machine xextant in by his former employer Jessie Ramsden.

Detail of Internal Mechanism. Sextant with Cover On. Detail of Engraved Serial Number. Box Sextant with Antique Finish. Telescope and Filter Extended. Detail of Filter and Mirror. Box Sextant and Lid. Box Sextant with Serial Number. Box Sextant in Hardwood Box. Hardwood Box for Box Sextant. Although mainly used for terrestrial observation, it was also suitable for small ships. The Box Sextant measures 3 inches 7.

Each sextant is stamped with a unique serial number and "Stanley London. Figure 6: Horizon mirror base. Thanks to the kindness of Bill Whiteley, I am now October able to add a few sentences about the origins of the box sextant. Mr Allan was a native of the parish of Edinkillie, who procured to himself a considerable portion of fame by the discovery of several simple, but most accurate methods of graduating mathematical instruments.

The pocket sextant, which gained him the prize and encouragement of the Society of Arts of London, was exhibited on the table of the institution at this meeting. It now belongs to Sir Thomas Dick Lauder. You have a very fascinating website. I have a H. What really got me though was your box sextant. I have one very similar to yours. The only difference being the absence of the telescope attachment screw.

Mine is labelled Stanley London, made in England, and has Arabic script and numerals engraved on the base. This is not surprising as I picked it up in a souke antique market in Cairo.

My belief is it was used by the surveyors who mapped out the Egyptian railway network post WWI. Mine is complete with leather case and a dark screw-on filter for the in-built telescope. I will shortly be posting an account of a Husun three circle sextant that came to me a a box of mud-covered bits and which is now again in a pristine condition too.

The serial number of my H. Hughes sextant is The certificate in the box lid is dated 21st July and declares the sextant to be Class A with no corrections required across the arc. Following your box sextant guidelines I stripped mine down for a clean and lub. What I thought to be a cover meant to slide down over the telescope is in fact the peephole sight used when you unscrew the telescope from the sextant. The telescope collapses fully within the sextant body. As an ex British Army engineering surveyor I am familiar with survey instruments and the like but am very keen to source a instruction book or original pamphlet on the use of the sextant, do you know of such a thing exists?

Thank you Daren. Anyone else who would like a copy of these pages for personal study please Contact me. Really facinating webpage, I have a Box Sextant by Frankham, it looks exactly like yours. I have been using a book by Jack Case as a guide, and am producing a small notebook of his rules for taking noon readings. I was interested to see the previous message about surveying as mine unit was used by the RAF, possibly for mapping airfields??

I was wondering about your thoughts on the safety and effectivness of the filters for a unit of this age, it has the red and green, and in addition to the peep hole it has a minute dark filter, presumably pre polorizing?

The safety of shades comes up periodically, in the context of worries about ultra-violet rays penetrating to and damaging the retina. Ultra-violet rays are quite well absorbed by ordinary glass and I would take the pragmatic view that if one can view the sun comfortably, the filters are satisfactory. Polaroid had not been invented in and, though older books write about a Nicol prism being used to reduce horizon glare, I have yet to see one.

From about onwards, sextants were occasionally fitted with crossed Polaroids as shades, notably the US Navy Mark II, and I have an instrument from that has them, but I find that the view of the sun is just on the edge of being too bright for comfort. Thanks Bill, I just bought this intriguing piece of craftmanship on the market today. The device has had a usefull life, judging from the wear of the paint.

However it operates well. No serial number nor other engravings. I wonder what the date of manufacturing is. It has a small external telescope, with a screw on cover, to protect the small lens cover for big lens missing?

The leather case is worn, but can be repaired. All in all a nice gadget. States, and does not apply to oversized items. Exclusions apply. Sextant with Alignment Tool. Sextant with Filter Extended. Detail of Telescope. Detail of Filter. Top View of Sextant and Lid. Detail of Internal Mechanism. Sextant with Cover On. Detail of Engraved Serial Number. Box Sextant with Antique Finish. Telescope and Filter Extended. Detail of Filter and Mirror.